Oar-lock.



G. J. MALMBERG.

OAR LOOK.

APPLICATION FILED MAY 9,190e.

Patented June 29, 1909.

[IIVenfor Charlesrfflal bery W Witnesses UNITED STATES PATENT @FFTCE.

CHARLES J. MALMBERG, OF THOMASTON, MICHIGAN.

OAR-LOCK.

To all whom it may concern:

Be it known that 1, CHARLES J. MALMBERG, a subject of the King of Sweden, residing at Thomaston, in the county of Gogebic and State of ll/lichigan, have invented certain new and useful Improvements in Oar-Locks, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to certain improvements in oar locks, and consists in the novel construction of a device of this character whereby the friction between the parts and the noise occasioned by rowing is reduced to a minimum.

The invention further consists in the peculiar arrangement and combination of the various parts of the oar lock, and still further in certain details of construction that will be hereinafter more fully set forth and pointed out in the claims.

In the drawings,-Figure 1 is a perspective view of my improved oar lock applied to a boat; Fig. 2 is a vertical central section therethrough, some of the parts being shown in elevation; and Figs. 3, 4 and 5 are detached erspective views of certain parts of the oar Took forming the adjusting means for the anti-friction bearings.

In general, the oar lock consists primarily of a socket section, as A, adapted to be secured to the gunwale of a boat, an upright section B mounted upon the socket section for movement in a horizontal plane, and an ear supporting section C carried by the upright section and arranged for movement in a vertical plane, these several movements between the parts permitting of forward and backward movement of the oar and the upand-down movement necessary in rowing.

The socket section referred to is preferably in the form of a bracket, provided with an arc-shaped section a adapted to be secured in any suitable manner to the outer side of the boat gunwale, and a transverse section 1) extending over the gunwale top and provided centrally with the socket member I).

The supporting section has a detachable engagement with the socket member, and is adapted to be locked thereto during the operation of rowing by means hereinafter set forth. In construction, it com rises essentially a spindle D and a loosely fitting sleeve E, the movement of the sleeve upon the spindle permitting the backward and forward movement of the oar.

Specification of Letters Patent.

Application filed May 9, 1908.

Patented June 29, 1909.

Serial No. 431,860.

To reduce the friction between the parts, I employ an antifriction bearingintermediate the sleeve and the spindle, and preferably one at each end of the sleeve as shown. The antifriction bearings are preferably a series of spheres a, which at the lower end of the upright are adapted to rest upon a conical bearing F upon the lower end of the spindle, and are retained in place by means oflateral and depending annular flanges c and d, as plainly shown in Fig. 2. At the upper end, a similar bearing is employed consisting of a series of balls or spheres (Z, laterally depending projecting annular flanges e f respectively, and a conical bearing J threaded upon an eXternally-threaded extension I upon the spindle end. Anut 1 serves tolock the parts in place.

For the purpose of taking up play between the parts I provide means for adjusting the bearings, and I have here shown the preferred construction of adjusting mechanism consisting of a cap plate K, centrally apertured as at a to receive the threaded end of the spindle, and slotted at 011 opposite sides of the aperture, these slots permitting the ex tension through the cap when in place of lugs a upon the upper face of the bearing J. Over the cap described is arranged a ring L, having a key b engaging a keyway b formed longitudinally in the threaded stem 1, the ring being thus held against relative rotary movement. Over the ring is arranged the thumb or wing nut I previously referred to. As thus constructed,the adjustment may be effected by first loosening the thumb nut and then turning the cap, which through the agency of the lugs o produces a corresponding movement of the bearing J. After the proper adjustment is effected, the thumb nut is screwed down in place and the parts locked.

The oar-*arrying section C is soi'newhat similar in construction to the upright just described, comprising a sleeve M fixed to the upright sleeve E and disposed transversely in relation thereto, the two sleeves being preferably cast in one piece, and a spindle O fitting within the sleeve and projecting therebeyond at its large end sulliciently to receive a strap member 1 which passes about the oar and forms a connection between the latter and the oar lock. At each end of the sleeve of the oar-supporting section I provide an antifriction bearing and means for adjusting the bearings similar in construction to those already described. The spindle O is continreceiving section 0 and the oar band or strap P is connected at its ends to this last-men*- tioned section by bolts (1 which hold the strap firmly in place;

From the construction as set forthi-t will be obvious that the oar may be moved backwardly and forwardly in the operation of rowingv with much ease and. with little if any noise, and the same is true of the vertical movement of the oar, which is permitted through the agency of the swivel connection betfiveen the supporting section and the upri t.

The upright and oar-supporting section are adapted to he carried by the oar, and are therefore removably mounted upon the socket section. The preferable connection between the parts consists of an externally threaded shank G upon the spindle D, Which is adapted to engage with an external thread H in the socket b. To-permit the upright to be inserted within the socket and quickly detached therefrom, the thread upon the shank G is cut away on its opposite sides, as at c,

for substantially one-fourth of the circum-- ference, and the thread H is similarly cut away or interrupted. By turning the spindle shank so that the threaded portions will come opposite the grooves in the socket thread the insertion of the spindle may be effected, and then by partially rotating the spindle the threads engage and the parts are I preferably employ an operat-- ing lever for effecting the locking engage-- ment, indicated by the reference-letter Q, this lever being apertured' and internally screw-threaded to permit of its being threadinterlocked.

ed upon the spindle shank as shown, and I further provide retaining means for the lever so that after the locking engagement be-; tween the parts-has been effected there will be no chance of the spindle working loose and becoming detached. The preferred form 01" retainer consists of a pin, as R, insertible through an aperture in the free end oi' the lever and a corresponding socket in the socket section, as plainly shown in Fig. 1.

That I claim as my invention is,

1. In an oar lock, the combination with a socket section, of an upright detachably engaging therewith, the parts being fashioned to interlock upon partial relative horizontal rotation, an oar supporting section carried by said upright, and means independent of said oar supporting section for holding the parts against relative movement after the interlocking engagement has been effected.

2. In an oar lock, the combination of a socket section and an upright detachably engaging the socket, the parts being fashioned to interlock upon partial relative horizontal rotation, an oar supporting section carried by said upright, a lever independent of said oar supporting section for rotating theupright, and a retaining member for the lever.

In an oar lock, the combination of a socket section internally screw threaded, and the thread being interrupted by oppositely disposed vertical grooves, of an upright section provided with a shank having a corresponding interrupted thread, an operating lever upon the upright, and a retainer for the lever.-

4. In an oar lock, the combination of a socket section and an upright detachably engaging the socket, the parts being fashioned to interlock upon partial relative rotation, an oar supportingsection carried by said upright and a lever ior'rotating said upright to effect the locking engagement.

5. In an oar lock, the combination with a socket section internally screw-threaded, and the thread being interrupted by spaced vertical grooves, of an upright section provided with a shank havin a' corresponding interrupted thread, and a lever for rotating the upright to effect the locking engagement between the parts.

6. In an oar lock, the combination with a' socket section, of an upright detachably' engaging the socket consisting ol'a spindle and a sleeve fitting the spindle for free rotary movement, an oar supportingv section comprising a sleeve similar to and arranged transversely of the upright sleeve and rigidly attach'ed thereto, and a spindle mounted within the sleeve for free rotary movement, and a securing strap connected to the spindle.

7. In an oar lock, the combination with a socket section, of an upright detachabl'y engaging the socket comprising a spindle, and a sleeve fitting the spindle for free rotary movement, an oar-supporting section, comprising'a' sleeve arranged transversely of the upright sleeve and attached thereto, and a spindle mounted within said latter sleeve for l'ree rotary movement. r

8. In an oar lock, the combination with a socket section, of a vertical spindle detachably engaging the same, a sleeve mounted upon the spindle for rotary movement, an oar-supporting section comprising a sleeve arranged transversely of the first-mentioned sleeve and carried thereby, and a spindle mounted within the sleeve 'l'orrotary movement, and anti-friction bearings intermediate the sleeve and spindles.

9'. In an oar lock, the combination with a socket section, of a vertical spindle detachably engaging the same, a sleeve mounted upon the spindle for rotary movement, an oar-supporting section comprising a sleeve arranged transversely of the first-mentioned sleeve and carried thereby, and a spindle mounted within the same l'or'rotary move ment, anti friction bearings intermediate the sleeves and spindles, and means for adjusting said bearings.

10. In an ear lock, the combination with a socket section, 01' a vertical spindle engaging the same, a sleeve mounted upon the spindle for rotary movement, an oar-sup porting section comprising a sleeve arranged transversely of the first-mentioned sleeve and rigidly secured thereto, a spindle mount ed Within the sleeve for free rotary movement and a bearing for the ear carried by one end of said spindle, ball bearing races at the opposite ends of said sleeves, cooperating conical bearings at the opposite ends of said s indles, and means for adjusting said conica l bearings in relation to the ball hearing races.

11. In an ear lock, the combination with a socket section, 01' a vertical spindle engaging the same, a sleeve mounted upon the spindle for rotary movement and having the ends thereof flared to form ball bearing races, cooperating conical bearin s carried by the spindle, one ol said conical bearings having a screw threaded engagement with the spindle, a cap plate apertured to engage said spindle and fitting over said conical bearing and its corresponding ball bearing race, and means [or clamping said conical bearings in its dill'erent positions of adjustment.

In testimony whereof I aflix my signature in presence 01' two witnesses.

CHAS. J. MALMBERG. WVitnesses:

ANDREW KRoNBnRe, IDA K'RoNBnRe. 

